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Goodwill Balances by Business Segment (Details) (USD $)
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12 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended | 12 Months Ended | 3 Months Ended | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Dec. 31, 2011
Deposits [Member]
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Dec. 31, 2010
Deposits [Member]
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Dec. 31, 2010
Card Services [Member]
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Jun. 30, 2011
Consumer Real Estate Services [Member]
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Dec. 31, 2010
Consumer Real Estate Services [Member]
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Dec. 31, 2011
Consumer Real Estate Services [Member]
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Dec. 31, 2010
Consumer Real Estate Services [Member]
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Dec. 31, 2011
Global Commercial Banking [Member]
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Dec. 31, 2010
Global Commercial Banking [Member]
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Dec. 31, 2011
Global Banking & Markets [Member]
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Dec. 31, 2010
Global Banking & Markets [Member]
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Dec. 31, 2011
Global Wealth & Investment Management [Member]
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Dec. 31, 2010
Global Wealth & Investment Management [Member]
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Dec. 31, 2011
All Other [Member]
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Dec. 31, 2010
All Other [Member]
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Dec. 31, 2011
International Consumer Card [Member]
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Sep. 30, 2011
International Consumer Card [Member]
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Sep. 30, 2011
CANADA
International Consumer Card [Member]
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| Goodwill [Abstract] | |||||||||||||||||||||||||
| Total Goodwill | $ 69,967,000,000 | $ 73,861,000,000 | $ 29,986,000,000 | $ 29,986,000,000 | $ 2,796,000,000 | $ 2,796,000,000 | $ 24,802,000,000 | $ 24,358,000,000 | $ 4,441,000,000 | $ 4,439,000,000 | $ 9,928,000,000 | $ 9,928,000,000 | $ 810,000,000 | $ 2,354,000,000 | |||||||||||
| In Text Details [Abstract] | |||||||||||||||||||||||||
| Goodwill Allocated Due To Sale of Business | 193,000,000 | 1,900,000,000 | 526,000,000 | ||||||||||||||||||||||
| Goodwill impairment | $ 3,184,000,000 | [1] | $ 12,400,000,000 | [1] | $ 0 | $ 0 | $ 10,400,000,000 | $ 10,400,000,000 | $ 2,600,000,000 | $ 2,000,000,000 | $ 2,603,000,000 | $ 2,000,000,000 | $ 581,000,000 | $ 581,000,000 | |||||||||||
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Goodwill Allocated Due To Sale of Business No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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